Discrepancy between experience rush and arena double xp

[Soxson]

I've noticed this a while but finally got a screenshot of both at once. Basically there is a one xp difference between getting arena double xp and an XP rush when townwalking (yes I am using recalls).

I assume this is the result of a rounding error. I will keep walking until I get both an xp rush and arena double xp and see how that affects the number

[Glitchless]

Travel experience requires an extra float to int conversion which could result in different rounding.